The choking/blocked feeling can also be caused by anxiety, which can be present even if we don't "feel" anxious.
Have you had any thyroid related testing done, such as blood work to test thyroid function? You should ask your doctor for Free T3, Free T4 (make sure it's FREE T3 and T4, not Total) and TSH, along with thyroid antibodies, Thyroid Peroxidase Antibodies (TPOab) and Thyroglobulin Antibodies (TgAb), plus a thyroid ultrasound to make sure nothing is pressing against your wind pipe.
Acid reflux/GERD is a very common symptom of hypothyroidism. If you have it, that's all the more reason to get thyroid hormones tested. Do you have any other symptoms of hypothyroidism, such as weight gain, constipation, swelling/edema, facial puffiness, fatigue, hair loss, muscle/joint aches/pains, brain fog, etc.
The chocked/blocked can be a possible symptom of acid reflux. My mother is free of severe GERD/LPR taking betaine HCL with pepsin supplements to increase stomach acid and digestive enzyme supplements to help with digestion.